branch-2.1: [enhance](mtmv)Only restrict MTMV to not allow concurrent insert overwrite execution #48673 #49965
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…write execution (#48673) ### What problem does this PR solve? Related PR: #40558 Problem Summary: Previously, on #40558, concurrent execution of `INSERT OVERWRITE` was restricted for all OLAP tables to address potential issues caused by concurrent execution. In this current PR, the restriction has been modified to only apply to Materialized Views (MTMV), as it appears that users can tolerate the uncertainty in execution results caused by concurrency for OLAP tables. ### Release note Only restrict MTMV to not allow concurrent insert overwrite execution
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Cherry-picked from #48673